Draft device.



N. K. OLWISTED.

DRAFT DEVICE.

APPLICATION, FILED Aue.6, I913.

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THE NORRIS PETERS COv PHOT0-LITHO.. WASHINGTON. Dv C JPatentedJune 1,1915.

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NORMAN K. OLMS'IED, OF MOLINE, ILLINOIS, ASSIGNOR TO DEERE & COMPANY, OFMOLINE, ILLINOIS, A CORPORATION OF ILLINOIS.

DRAFT DEVICE.

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Application filed August 6, 1913.

To all whom it may concern Be it known that I, NORMAN K. OLMsTnD, acitizen of the United States, residing at Moline, in the county of RockIsland and State of Illinois, have invented certain new and usefulImprovements in Draft Devices, of which the following is aspecification, reference being had therein to the accompanying drawing.

My invention relates to draft mechanism particularly as applied toagricultural machinery, and my object is to preserve the uniformity ofthe draft whether it be directly ahead or employed in making a turn.

Referring to the drawings in which similar numerals indicate identicalparts Figure 1 is a plan view of my invention as applied to a harvester.Fig. 2 is an enlarged side elevation of the forward end of the poleshowing the part of my invention mounted thereon. Fig. 3 is a plan viewwith the draft appliances omitted, and Fig. 4: is a front elevation inpart section of Fig. 3.

A stub tongue 1, shown in part only, is ordinarily attached to the frontof a machine or implement usually utilized in agricultural operations.The forward part of the stub tongue is pivotally supported on a truck 2by a standard 3. An equalizer, comprising an equalizer bar 4 carryingdoubletrees, is pivotally supported at 1* on bracket arms 5 and 6secured 011 the stub tongue 1 and extended laterally; a brace rod 7connects with the pivot of the equalizer and extends rearwardly when itis ordinarily attached to the machine or implement to be drawn.

An arm 8 is secured to the stub tongue 1 and carries a pulley 9; a pole10 is pivotally connected to the stub tongue 1 and has mounted thereon apulley 11. Secured preferably to a bolt 12 is one end of cable 13 whichpasses around the pulley 9 and the pulley 11 and leads forward and overa vertically disposed pulley 11 mounted on the forward end of the pole10 to a neck yoke 15; a rod 16 is secured to supports 17 and 18 whichare mounted on the pole 10 and which project suiiiciently thereaboveclear of the pole 10 to permit passage of the cable 13; the rod 16passes through an eye 19 on the neck yoke 15, the rod 16 acting as aguide for the forward and backward movement of the neck yoke 15.

In a draft mechanism of the class shown Specification of Letters Patent.

Patented June 1, 1915.

Serial no. 783,401.

and described in which the pole and equalizer are pivoted at differentpoints, but in which no provision is made for maintaining the samedistance between the neck yoke and double-equalizer during any lateralmovement of the pole, a heavy strain is brought upon the harness whenthe pole is turned, as shown in dotted lines in Fig. 1, because of theincrease in the distance between the neck yoke and equalizer, and if thepole is turned in the opposite direction the distance between the neckyoke and equalizer bar will be decreased, crowding the horses againstthe latter and materially interfering with a proper guidance of themachine to which the draft mechanism is attached.

in the operation of my device, in which the pole 10 and truck 2 areproperly connected to turn simultaneously to right or left, the normalposition of the parts when the draft is directly ahead is shown in fulllines in Fig. 1. When the turn is made in the direction shown by dottedlines, the equalizer turns on its pivot 49, and as the position of thehorses is constant to both the equalizer 4 and neck yoke 15, it followsthat the latter must move longitudinally of the pole 10 to maintain aset distance from the pivotal point 1 of the equalizer 1 and to preservethe proper position of the horses with relation to the neck yoke 15 andequal izer. As the pole turns on its pivot, as shown in Fig. 1, itapproaches the arm 8, and recedes from the pivotal point 4 whichordinarily would slacken the cable 13, but the neck yoke 15, travelingfreely and rearwardly on the rod 16 takes up the slack, the cable movingover the pulley 9 on the arm 8 and the pulleys 11 and ll on the pole 10.If, however, the turn is made in the direction opposite to that shown indotted lines in Fig. 1, the pole 10 will approach the pivotal point 45and recede from the arm 8, and the cable 13 having its rearward endsecured to the pole will be drawn rearwardly over the pulley 9 on thearm 8 and pulleys 11 and 1 1 on the pole 10, and having its forward endattached to the neck yoke 15 the latter will be drawn forwardly on therod 16, maintaining a set distance between the pivot point 1* and theneck yoke. It is apparent that a set distance between the neck yoke 15and the pivot point a being secured, it is maintained by proportioningthe speed of movement of the neck yoke 15 results can be secured bychanging the arm 8 and the equalizer support to the opposite sides ofthe stub tonguel respectively.

What I claim is I 1. In a draft mechanism, the combination of a stubtongue, a pole pivotally connected to the stub tongue to swinglaterally, an equalizer pivotally supported on the stub tongue, a neckyoke onthe pole, and means on the stub tongue and pole and connectedwith the neck yoke to maintain substantially constant the distance ofthe latter from the equalizer when the pole is moved.

2. In a draftmechanism, the combination of a stub tongue having asupport, a. pole pivotally connected to the stub tongue to swinglaterally, an equalizer pivotally mounted on a support on the stubtongue, a neck yoke on the pole, and means on the stub tongue andpoleand connected to the neck yoke to maintain substantially constant thedistance of the latter from the equalizer when the pole is moved. 30"

3. In a draft mechanism, the combination of a stub tongue havingasupport, a pole pivotally' connected to the stub tongue to swinglaterally, an equalizer pivotally mounted on alaterally extended supporton thestub tongue, a neck yoke on the pole, and means on the stub tongueand pole and connected to the neck yoke to maintain substantiallyconstant the distance of the latter from the equalizer when the pole ismoved.

4. In a draft device, the combination of a stub tongue having a support,a pole pivotally connected to the stub tongue to swing I i,141,25o

laterally, an equalizer pivotally mounted on av laterally extendedsupport on the stub tongue, a neck yoke on the pole, and means on thestub tongue and pole and connected to the neck yoke to move the latterforwardly when the pole is turned in one direction.

5. In a draft device, the combination of a stub tongue having a support,a pole pivotally connected to the stub tongue to swing laterally, anequalizer pivotally mounted on a support 011 the stub tongue, a neckyoke slidably mounted on the pole and adapted to move forwardly when thepole is turned in one direction and rearwardly when the pole is turnedin the opposite direction, and means on the stub tongue and pole andconnected to the neck yoke to maintain substantially constant thedistance of the latter from the equalizer when the pole is turned.

6. In a draft device, the combination of a stub tongue having a support,a pole pivotally connected to the stub tongue to swing laterally, anequalizer pivotally mounted on a support xtending laterally from oneside of the stub tongue, an arm mounted on the opposite side of saidstub tongue and laterally extended therefrom, a pulley on said arm, apulley on the pole, a pulley on the forward portion of the pole, a neckyoke slidably mounted on the pole, and a cable connected rearwardly tothe pole and forwardly to the neck yoke and adapted to travel over saidpulleys to maintain substantially constant the distance of the neck yokefrom the equalizer.

In testimony whereof I aiiix my signature, in presence of two witnesses.

NORMAN K. OLMSTED. Witnesses:

MARTIN PETERSON, W. G. DUFFIELD.

Copies of this patent may be obtained for five cents each, by addressingthe Gommissionen of latenta, Washington, 13. 6.

